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Influence of Preload Dependence on the Effect of Phenylephrine on Cardiac Output

This study has been completed.
Information provided by (Responsible Party):
University Hospital, Caen Identifier:
First received: November 16, 2012
Last updated: September 12, 2014
Last verified: September 2014

The perioperative hemodynamic management aims to ensure organ perfusion pressure and an oxygen arterial transport adapted to oxygen consumption. Phenylephrine is the α-adrenergic agonist widely used during anesthesia for arterial pressure control.

Several questions on phenylephrine global and regional hemodynamics effects remain unresolved.

The investigators assume that Phenylephrine may decrease cardiac output by increasing the afterload, while most likely could also make an increase or a stability of cardiac output by action on the venous return. The investigators propose an observational study assessing the influence of preload dependence, defined by the values of pulse pressure variation, on the effect of phenylephrine on cardiac output, measured beat by beat by esophageal Doppler.

The aim of the investigators work is to improve the understanding of phenylephrine action, a daily use therapeutic action, to improve the patients care.


Study Type: Observational
Study Design: Time Perspective: Prospective
Official Title: Influence of Preload Dependence on the Effect of Phenylephrine on Cardiac Output

Resource links provided by NLM:

Further study details as provided by University Hospital, Caen:

Primary Outcome Measures:
  • cardiac output [ Time Frame: one year ]
    Comparing cardiac output values before and after injection of a phenylephrine bolus, based on the existence of a preload dependency, defined by a measure of respiratory variation of pulse pressure greater than or equal to 13%.

Estimated Enrollment: 50
Study Start Date: November 2012
Study Completion Date: July 2013
Primary Completion Date: July 2013 (Final data collection date for primary outcome measure)

Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Sampling Method:   Non-Probability Sample
Study Population
General anesthesia.Orotracheal intubation and mechanical ventilation Advanced Hemodynamic Monitoring intraoperative ( arterial pressure catheter, esophageal Doppler)

Inclusion Criteria:

  • Hypotension (SBP <90 mm Hg and / or MAP <60 mm Hg)
  • Injection of a bolus of phenylephrine at the discretion of the anesthesiologist physician in charge of the patient.

Exclusion Criteria:

  • Minor or major patient under guardianship
  • Esophageal Diseases
  • supra ventricular rhythm trouble
  • Severe valvular
  • Shunt intracardiac
  • Vt <7ml/kg theoretical weight
  • heart rate / respiratory rate <3.6
  • Clinical hypepression of intra-abdominal
  • Compliance <30 mL/cmH2O
  • pulmonary hypertension, Right ventricular failure
  • Spontaneous Ventilation
  • Thorax open
  • VG severe dysfunction (LVEF <40%)
  • Prior Injection of ephedrine prior
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Please refer to this study by its identifier: NCT01730820

CAEN University Hospital
Caen, Basse Normandie, France, 1400
Sponsors and Collaborators
University Hospital, Caen
Principal Investigator: Olivier REBET, M.D University Hospital, Caen
  More Information

Responsible Party: University Hospital, Caen Identifier: NCT01730820     History of Changes
Other Study ID Numbers: NEO CO
A12-D20-VOL12 ( Other Identifier: Basse Normandie FRANCE ethics committee )
Study First Received: November 16, 2012
Last Updated: September 12, 2014

Additional relevant MeSH terms:
Vascular Diseases
Cardiovascular Diseases
Cardiotonic Agents
Autonomic Agents
Peripheral Nervous System Agents
Physiological Effects of Drugs
Vasoconstrictor Agents
Nasal Decongestants
Respiratory System Agents
Adrenergic alpha-1 Receptor Agonists
Adrenergic alpha-Agonists
Adrenergic Agonists
Adrenergic Agents
Neurotransmitter Agents
Molecular Mechanisms of Pharmacological Action
Protective Agents processed this record on September 21, 2017